. Bulletin - United States National Museum. Science. Figs. 49-53.—Cyathostoma tadornae. 49, Male. 50, Female tail. From Chapin, 1925, after Chatin, 1874. 51, Cyathostoma laki. Female ; entire worm. 52, Female ; head end. 53, Vulva. After Blanchard, 1849 CYATHOSTOMA LARI E. Blanchard, 1849 Synonyms.—Strongylus, species Siebold, 1837; Sclerosto-ma cya- thostomum Diesing, 1851; Sclerostomy lari (E. Blanchard, 1849) Molin, 1861a; Syngamus lari (E. Blanchard, 1849) Railliet, 1898. Hosts.—Lams rudibundus, L. fuscus, and Larus, species. Location.—Nasal and orbital cavities. Morphology.—Cyathostoma (p
. Bulletin - United States National Museum. Science. Figs. 49-53.—Cyathostoma tadornae. 49, Male. 50, Female tail. From Chapin, 1925, after Chatin, 1874. 51, Cyathostoma laki. Female ; entire worm. 52, Female ; head end. 53, Vulva. After Blanchard, 1849 CYATHOSTOMA LARI E. Blanchard, 1849 Synonyms.—Strongylus, species Siebold, 1837; Sclerosto-ma cya- thostomum Diesing, 1851; Sclerostomy lari (E. Blanchard, 1849) Molin, 1861a; Syngamus lari (E. Blanchard, 1849) Railliet, 1898. Hosts.—Lams rudibundus, L. fuscus, and Larus, species. Location.—Nasal and orbital cavities. Morphology.—Cyathostoma (p. 41) : Red worms, attenuated an- teriorly. Buccal capsule (fig. 52) marked in front by an annulation. Esophagus muscular, gradually widening posteriorly. Intestine sinuous. Male 6 to 8 mm. long. Body ends abruptly at tail end. Bursa said to have 6 rays, of which the middle are the most marked (no satisfactory data on this feature). Spicules equal. Testis a single very wide tube, sinuous anteriorly. Female 6 to 13 mm. long by 500/i. to 1 mm. wide; body width (fig. 51) approximately uniform except for anterior third, in which it diminishes anteriorly to the head. Tail with slender conical tip. Cuticula finely striated. Esophagus length y5 of body length. Ovaries join capacious uteri which unite to form a vagina 2 Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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